Brother MFC620CN Service Manual page 313

9.2.6 Possible component defects and resulting problems ........................................ 9-39
[ 1 ] ADF mechanism (Applicable to models with ADF units)........................... 9-39
[ 2 ] Scanner mechanism.................................................................................. 9-40
[ 3 ] Head/carriage unit drive and purge mechanisms...................................... 9-41
[ 4 ] Print head mechanism............................................................................... 9-42
[ 5 ] ASF mechanism ........................................................................................ 9-43
[ 6 ] Paper feeding mechanism......................................................................... 9-43
[ 7 ] Speaker ..................................................................................................... 9-43
[ 8 ] Control panel ............................................................................................. 9-44
[ 9 ] PCBs.......................................................................................................... 9-44
[ 10 ] Adjustments/data in the memories ............................................................ 9-45
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